Mg Isotope Interlaboratory Comparison of Reference Materials from Earth-Surface Low-Temperature Environments

Netta Shalev*, Juraj Farkaš, Jan Fietzke, Martin Novák, Jan A. Schuessler, Philip A.E. Pogge von Strandmann, Philip B. Törber

*Corresponding author for this work

Research output: Contribution to journalArticle (Academic Journal)peer-review

27 Citations (Scopus)
232 Downloads (Pure)

Abstract

To enable quality control of measurement procedures for determinations of Mg isotope amount ratios, expressed as δ26Mg and δ25Mg values, in Earth-surface studies, the δ26Mg and δ25Mg values of eight reference materials (RMs) were determined by interlaboratory comparison between five laboratories and considering published data, if available. These matrix RMs, including river water SLRS-5, spring water NIST SRM 1640a, Dead Sea brine DSW-1, dolomites JDo-1 and BCS-CRM 512, limestone BCS-CRM 513, soil NIST SRM 2709a and vegetation NIST SRM 1515, are representative of a wide range of Earth-surface materials from low-temperature environments. The interlaboratory variability, 2s (twice the standard deviation), of all eight RMs ranges from 0.05 to 0.17‰ in δ26Mg. Thus, it is suggested that all these materials are suitable for validation of δ26Mg and δ25Mg determinations in Earth-surface geochemical studies.

Original languageEnglish
Pages (from-to)205-221
Number of pages17
JournalGeostandards and Geoanalytical Research
Volume42
Issue number2
Early online date5 Mar 2018
DOIs
Publication statusPublished - 1 Jun 2018

Keywords

  • Earth-surface
  • interlaboratory comparison
  • low-temperature
  • Mg isotopes
  • reference materials

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